10.9k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
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6 papers · 2 filters
Effects of Dark Energy Perturbations on Cosmological Tests of General Relativity
Jason Dossett, Mustapha Ishak
Cosmological tests to distinguish between dark energy (DE) and modifications to gravity are a promising route to obtain clues on the origin of cosmic acceleration. We study here th…
The effects of structure anisotropy on lensing observables in an exact general relativistic setting for precision cosmology
M. A. Troxel, Mustapha Ishak, Austin Peel
The study of relativistic, higher order and nonlinear effects has become necessary in recent years in the pursuit of precision cosmology. We develop and apply here a framework to s…
Effects of anisotropy on gravitational infall in galaxy clusters using an exact general relativistic model
M. A. Troxel, Austin Peel, Mustapha Ishak
We study the effects and implications of anisotropies at the scale of galaxy clusters by building an exact general relativistic model of a cluster using the inhomogeneous and aniso…
In-in and calculations of the bispectrum from non-attractor single-field inflation
Xingang Chen, Hassan Firouzjahi, Eiichiro Komatsu +2
In non-attractor single-field inflation models producing a scale-invariant power spectrum, the curvature perturbation on super-horizon scales grows as . This i…
Stringent Restriction from the Growth of Large-Scale Structure on Apparent Acceleration in Inhomogeneous Cosmological Models
Mustapha Ishak, Austin Peel, M. A. Troxel
Probes of cosmic expansion constitute the main basis for arguments to support or refute a possible apparent acceleration due to different expansion rates in the universe as describ…
Relic Vector Field and CMB Large Scale Anomalies
Xingang Chen, Yi Wang
We study the most general effects of relic vector fields on the inflationary background and density perturbations. Such effects are observable if the number of inflationary e-folds…